Blood pressure, a critical health indicator, fluctuates throughout the day due to various factors.
Frequently Asked Questions
Why is my blood pressure high in the morning?
Normal — your body's circadian rhythm naturally raises BP as you wake up (called the morning surge). Cortisol peaks, arteries constrict, heart works harder to get you moving. A moderate rise is expected. What's abnormal: a sharp surge that pushes BP above your usual daytime range or above 135/85 — that's morning hypertension and doubles heart attack and stroke risk.
How do I test if I have morning hypertension?
Measure BP within 1 hour of waking (before medication, before caffeine, after emptying bladder). Sit quietly 5 minutes first. Take 2 readings a minute apart, log both. Do this daily for a week. If morning average is consistently over 135/85 — or 15+ points higher than your afternoon readings — talk to your doctor. A 24-hour ambulatory BP monitor gives the definitive answer.
What causes morning BP spikes?
Poor sleep or sleep apnea (biggest culprit), evening medication that wears off overnight, high salt dinner, alcohol the night before, chronic stress, obesity, and — commonly — BP medication timing mismatch. Solution often: doctor moves one BP tablet to bedtime, treats underlying sleep apnea, or cuts evening salt. Simple tweaks; don't self-adjust.
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